Fix Buefy "row grids" when viewing parent; add basic file upload support

tailbone/static/js/tailbone.buefy.form.js

@@ -3,5 +3,3 @@ let TailboneForm = {
     template: '#tailbone-form-template',
     methods: {}
 }
-
-let TailboneFormData = {}

tailbone/static/js/tailbone.buefy.oncebutton.js

@@ -5,6 +5,9 @@ const OnceButton = {
         '<b-button',
         ':type="type"',
         ':native-type="nativeType"',
+        ':tag="tag"',
+        ':href="href"',
+        ':title="title"',
         ':disabled="disabled"',
         '@click="clicked"',
         '>',
@@ -15,7 +18,10 @@ const OnceButton = {
     props: {
         type: String,
         nativeType: String,
+        tag: String,
+        href: String,
         text: String,
+        title: String,
         working: String,
         workingText: String,
         disabled: Boolean